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You need more coffee. The hanger is threaded and will be pulled towards the face of the flange. And because the flange is brazed to the dropout nothing will move once bolted
Hulsroy-
You need more coffee.
Done
the flange is brazed to the dropout
Got it, I hadn't understood that from the previous discussion.
I'd want the pink bit to be much more stiff than the hanger, otherwise the removable nature of the hanger is a bit redundant. Hanger is shown as thicker than pink bit, so presumably hanger to be machined aluminium alloy?
If the hanger did have a flange on the inside face of the dropout, you'd be able to avoid brazing the pink bit, be able to replace it if it did become damaged, and would have a consistent relationship between the derailleur and the outer face of the hub axle - which should improve shifting consistency.
Just my thoughts of course.
Cupcakes
You need something on the inner face of the dropout, connected to the hanger, to stop it moving to the right. Or I need to have more coffee :)
Looks great either way. I'm also a fan of the bricoleur approach.